At the product page it does say it has 15 PWM outputs and in several shops it does say that there are just 14.

Which number is correct? I as because i am going to build a 5x5x5 rgb led cube and the 15 pwm signals would help not to demultiplex. I could set 5 Leds at once and just need 25 more IO for the right row. That would be in total 40 IO for a whole cube without demultiplexing.

The arduino shop itself says that it does have 14. The support already confirmed me, that it does have 15. So there is a misstake at the shop text. (See here: http://store.arduino.cc/eu/index.php?main_page=product_info&cPath=11&products_id=196 ) Also other shops do say that it does have 14.